a bigger boxer engine hop up discussion

[EuroIron]

yeah........... those Koni's work very well

the candlesticks do have a certain minimalistic bit of charm to them though

what do you have hiding under those BMW shrouds on your Velo?


now, where is the good point to measure for the 1/4" offset difference on the pre and post 68 final drives to make certain that is what they are?

I am looking at a pile of them with one must be post 68 and two 32/11 pre-60's

and right off the bat, I'm not seeing it

going to get some measuring equipment and will take a stab at it

going to liquefy them all so if anyone is looking for some really nice low miles units

speak now before I turbo-list them

aiming to have them on this evening but for sure before prime time tomorrow

also going to let some "non-S" and "S" transmissions go and all are very nice

615-478-4175

[niall4473]

what do you have hiding under those BMW shrouds on your Velo?

just the same as in your pic with the candlesticks, regular Konis I put on in about 1985.

now, where is the good point to measure for the 1/4" offset difference on the pre and post 68 final drives to make certain that is what they are?

Sorry, cannot help at all there, don't know anything at all about such modern stuff, by post '68 do you mean /5?.
I would start by measuring from the shoulder of the splined shaft that mates with the hub and the input shaft c/l. then the input bell housing face and the spindle c/l, and the input shaft c/l and the face of the brake actuator spindle boss in the drum and look for any differences there to known units, like you have, thats just a suggestion.

[EuroIron]

somehow I kinda figured you'd pull such a stunt and hide some Koni's under there......... nice

I agree that is what that gearbox is, thanks

it cleaned up really nice

post 68 I mean 68 and 69 /2 and US versions, I think anyhow

they had a half inch wider tire and not sure if the swing arm is also different to clear up front

[niall4473]

Doubt if the swinging arm is different, you'd need a shaft with two Hardy-Spicers, unless its just a slimmer tube, therefore the difference would have to be in the rear drive case between the input c/l and the output shaft shoulder, thinking about it, you'd need a different spindle too, surely, and the rim would have to be offset by 1/8", like on a bendy Norton.
You live and learn, I'd never heard of this modification, but then, living on this side of the water, I've never seen a US fork bike either.

[comet]

EuroIron, The 750CC kit used a new cylinder that required a larger opening in the crankcase. Dealers used a boring tool supplied by the company. The base of the cylinders covered the four mounting studs. Long internally threaded tubes attached the cylinders to the housing. If you would like to see the setup send me your E-mail address and I will send you a picture of mine. I actually know of two others in the USA. The 400 X 18 rear tire used on the US models fit the standard swing arm but had to be deflated to remove or install..............Comet

[EuroIron]

that rocks, like to see it and a bit of machine work is only a step

ironpimpofpain @ yahoo.com

[EuroIron]

geeze......... the more I look at that Isetta box

the more the notion of a BMW sidehack or trike, with reverse, appeals to me

de dion off a tiny euro sports car and 3 wheel indy suspension

[EuroIron]

yeah the 600 or 700 trans-axle would be the way to go for a trike

[VBMWMO]

what various methods have been employed in the pursuit of speed and/or more displacement

what known weaknesses or strengths frown upon or favor the various methods

and have any of you run heads having an exhaust valve guide saving vane welded inside the port?

anyone even running 600 or so cc's at a CR of 10:1 or more?